Updated Rows are designed for when rows change rarely and you wish to see what has changed. (For fast ticking data use the Flashing Cell funtion).
If the function is enabled, then each time a cell value changes the row will change colour. You can also choose to have the Grid 'jump' to display the updated row.
If the change occurs in a numeric or date cell then the row will dispaly the 'Up' or 'Down' colour depending on the direction of the change. For other cells it wil use the 'neutral' colour.
You can clear an updated row through the Context Menu, and you can clear all updated rows through the Column Header Menu.